...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems >A new dissolution microcalorimeter: calibration and test
【24h】

A new dissolution microcalorimeter: calibration and test

机译：新型溶出量热仪：校准和测试

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A new batch microcalorimetric vessel for the determination of enthalpies of dissolution of small amounts of easily or slightly soluble solids was developed at University of Lund, Sweden and was tested at University of Porto, Portugal. The vessel forms part of a series of twin heat conduction microcalorimeters. In a series of consecutive dissolution steps up to four samples, each 0.1-3 mg, can be injected into a solvent chamber of the vessel, volume 20 ml. The high stability of the baseline allows solution experiments to be extended over several hours. All measurements reported were conducted at 298.15 K and with water as the solvent. The calorimeter was calibrated chemically by dissolution of potassium chloride. The performance of the instrument was further tested by measurements of the enthalpies of dissolution of acetanilide and adenine, 18.25 +/- 0.56 and 31.78 +/- 0.64 kJ mol(-1), respectively. No concentration dependence was found. The results are in good agreement with values in the literature. (C) 2003 Elsevier Science B.V. All rights reserved. [References: 24]
机译：瑞典隆德大学开发了一种用于测定少量易溶或微溶性固体溶解焓的新型批次微量量热容器，并在葡萄牙波尔图大学进行了测试。该容器是一系列双导热微热量计的一部分。在一系列连续的溶解步骤中，可以将多达四个样品（每个0.1-3 mg）注入到容器的溶剂室中，体积为20 ml。基线的高稳定性使溶液实验可以延长几个小时。报告的所有测量均在298.15 K且以水为溶剂的条件下进行。通过溶解氯化钾对热量计进行化学校准。通过测量对乙酰苯胺和腺嘌呤的溶解焓分别为18.25 +/- 0.56和31.78 +/- 0.64 kJ mol（-1）进一步测试了仪器的性能。没有发现浓度依赖性。结果与文献中的值非常吻合。 （C）2003 Elsevier Science B.V.保留所有权利。 [参考：24]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号